mirror of
https://github.com/monero-project/monero.git
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206 lines
7.9 KiB
C++
206 lines
7.9 KiB
C++
// Copyright (C) 2011 Milo Yip
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef RAPIDJSON_PRETTYWRITER_H_
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#define RAPIDJSON_PRETTYWRITER_H_
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#include "writer.h"
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#ifdef __GNUC__
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RAPIDJSON_DIAG_PUSH
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RAPIDJSON_DIAG_OFF(effc++)
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#endif
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namespace rapidjson {
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//! Writer with indentation and spacing.
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/*!
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\tparam OutputStream Type of ouptut os.
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\tparam SourceEncoding Encoding of source string.
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\tparam TargetEncoding Encoding of output stream.
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\tparam StackAllocator Type of allocator for allocating memory of stack.
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*/
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template<typename OutputStream, typename SourceEncoding = UTF8<>, typename TargetEncoding = UTF8<>, typename StackAllocator = CrtAllocator>
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class PrettyWriter : public Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator> {
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public:
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typedef Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator> Base;
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typedef typename Base::Ch Ch;
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//! Constructor
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/*! \param os Output stream.
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\param allocator User supplied allocator. If it is null, it will create a private one.
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\param levelDepth Initial capacity of stack.
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*/
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PrettyWriter(OutputStream& os, StackAllocator* allocator = 0, size_t levelDepth = Base::kDefaultLevelDepth) :
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Base(os, allocator, levelDepth), indentChar_(' '), indentCharCount_(4) {}
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//! Set custom indentation.
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/*! \param indentChar Character for indentation. Must be whitespace character (' ', '\\t', '\\n', '\\r').
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\param indentCharCount Number of indent characters for each indentation level.
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\note The default indentation is 4 spaces.
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*/
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PrettyWriter& SetIndent(Ch indentChar, unsigned indentCharCount) {
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RAPIDJSON_ASSERT(indentChar == ' ' || indentChar == '\t' || indentChar == '\n' || indentChar == '\r');
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indentChar_ = indentChar;
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indentCharCount_ = indentCharCount;
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return *this;
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}
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/*! @name Implementation of Handler
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\see Handler
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*/
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//@{
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bool Null() { PrettyPrefix(kNullType); return Base::WriteNull(); }
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bool Bool(bool b) { PrettyPrefix(b ? kTrueType : kFalseType); return Base::WriteBool(b); }
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bool Int(int i) { PrettyPrefix(kNumberType); return Base::WriteInt(i); }
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bool Uint(unsigned u) { PrettyPrefix(kNumberType); return Base::WriteUint(u); }
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bool Int64(int64_t i64) { PrettyPrefix(kNumberType); return Base::WriteInt64(i64); }
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bool Uint64(uint64_t u64) { PrettyPrefix(kNumberType); return Base::WriteUint64(u64); }
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bool Double(double d) { PrettyPrefix(kNumberType); return Base::WriteDouble(d); }
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bool String(const Ch* str, SizeType length, bool copy = false) {
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(void)copy;
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PrettyPrefix(kStringType);
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return Base::WriteString(str, length);
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}
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bool StartObject() {
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PrettyPrefix(kObjectType);
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new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(false);
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return Base::WriteStartObject();
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}
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bool Key(const Ch* str, SizeType length, bool copy = false) { return String(str, length, copy); }
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bool EndObject(SizeType memberCount = 0) {
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(void)memberCount;
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RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
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RAPIDJSON_ASSERT(!Base::level_stack_.template Top<typename Base::Level>()->inArray);
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bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
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if (!empty) {
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Base::os_->Put('\n');
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WriteIndent();
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}
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if (!Base::WriteEndObject())
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return false;
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if (Base::level_stack_.Empty()) // end of json text
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Base::os_->Flush();
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return true;
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}
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bool StartArray() {
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PrettyPrefix(kArrayType);
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new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(true);
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return Base::WriteStartArray();
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}
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bool EndArray(SizeType memberCount = 0) {
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(void)memberCount;
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RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
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RAPIDJSON_ASSERT(Base::level_stack_.template Top<typename Base::Level>()->inArray);
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bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
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if (!empty) {
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Base::os_->Put('\n');
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WriteIndent();
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}
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if (!Base::WriteEndArray())
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return false;
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if (Base::level_stack_.Empty()) // end of json text
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Base::os_->Flush();
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return true;
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}
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//@}
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/*! @name Convenience extensions */
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//@{
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//! Simpler but slower overload.
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bool String(const Ch* str) { return String(str, internal::StrLen(str)); }
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bool Key(const Ch* str) { return Key(str, internal::StrLen(str)); }
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//@}
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protected:
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void PrettyPrefix(Type type) {
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(void)type;
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if (Base::level_stack_.GetSize() != 0) { // this value is not at root
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typename Base::Level* level = Base::level_stack_.template Top<typename Base::Level>();
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if (level->inArray) {
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if (level->valueCount > 0) {
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Base::os_->Put(','); // add comma if it is not the first element in array
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Base::os_->Put('\n');
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}
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else
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Base::os_->Put('\n');
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WriteIndent();
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}
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else { // in object
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if (level->valueCount > 0) {
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if (level->valueCount % 2 == 0) {
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Base::os_->Put(',');
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Base::os_->Put('\n');
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}
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else {
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Base::os_->Put(':');
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Base::os_->Put(' ');
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}
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}
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else
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Base::os_->Put('\n');
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if (level->valueCount % 2 == 0)
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WriteIndent();
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}
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if (!level->inArray && level->valueCount % 2 == 0)
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RAPIDJSON_ASSERT(type == kStringType); // if it's in object, then even number should be a name
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level->valueCount++;
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}
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else {
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RAPIDJSON_ASSERT(!Base::hasRoot_); // Should only has one and only one root.
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Base::hasRoot_ = true;
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}
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}
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void WriteIndent() {
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size_t count = (Base::level_stack_.GetSize() / sizeof(typename Base::Level)) * indentCharCount_;
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PutN(*Base::os_, indentChar_, count);
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}
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Ch indentChar_;
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unsigned indentCharCount_;
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private:
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// Prohibit copy constructor & assignment operator.
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PrettyWriter(const PrettyWriter&);
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PrettyWriter& operator=(const PrettyWriter&);
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};
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} // namespace rapidjson
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#ifdef __GNUC__
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RAPIDJSON_DIAG_POP
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#endif
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#endif // RAPIDJSON_RAPIDJSON_H_
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